Drawing mechanism for a spinning machine



Oct. 19, 1965 E. F. scHMlD ETAL 3,212,139

DRAWING MECHANISM FOR A SPINNING MACHINE Filed June 13, 1962 6 Sheets-Sheet 1 Oct. 19, 1965 E. F. scHMlD ETAL 3,212,139

DRAWING MECHANISM FOR A SPINNING MACHINE Filed June 13, 1962 6 Sheets-Sheet 2 Oct 19, 1965 E. F. scHMlD ETAL 3,212,139

DRAWING MECHANISM FOR A SPINNING MACHINE Filed June l5, 1962 6 Sheets-Sheet 3 A jmsp/[1111111111111] i* Oct. 19, 1965 E F.5CHM1D ETAL 3,212,139

DRAWING MECHANISM FOR A SPINNING MACHINE Filed June l5, 1962 6 Sheets-Sheet 4 Oct. 19, 1965 E. F. SCHMID ETAL DRAWING MECHANISM FOR A SPINNING MACHINE Filed June 13, 1962 6 Sheets-Sheet 5 Oct. 19, 1965 E. F. scHMlD ETAL. 3,212,139

DRAWING MECHANISM FOR A SPINNING MACHINE Filed June 13, 1962 6 Sheets-Sheet 6 M/ Km/ United States Patent O s claims. (Cl. 19-282) This invention relates to drawing mechanisms for spinning machines, and more particularly to improvements in the type of drawing mechanism in which the bottom rollers are rotated about respective fixed axes on the supporting frame of the machine, and the top rollers are rotatably mounted on a carrier arm which is pivoted to the supporting frame for movement toward and away from the drawing area defined by the location of the bottom rollers.

In order to permit handling of a variety of fibrous materials, it is desirable and necessary to vary the spacing of the top rollers on the carrier arm in the direction of movement of the material being drawn, and also to vary the pressure with which the top rollers are urged against the cooperating bottom rollers. In the type of drawing mechanism with which this invention is specifically concerned, the carrier arm is capable of being locked on the supporting frame in an operative position, and the pressure exerted by the top rollers is provided by springs interposed between the carrier arm and the individual rollers. The position of the top rollers is substantially fixed in the operative condition of the mechanism by engagement with the bottom rollers, and it is known to control the pressure of the top rollers by means of adjusting screws which are rotated to vary the stress of the springs in a stepless, continuous manner.

A spinning machine includes a large number of drawing mechanisms which must operate uniformly. A changeover from one set of operating conditions to another involving pressure changes for the top rollers in the known arrangement requires a relatively large amount of labor not only for making the adjustment, but also for testing the adjusted pressure, and is conducive to error.

A primary object of this invention is an improvement in the known spring loaded top roller arrangement which permits changes in pressure to be made in predetermined discrete steps so as to avoid the need for testing.

Another object is to simplify the pressure changing operation so as to reduce the amount of labor involved.

A further object is to provide readily discernible indicia which visually indicate the pressure level at which a top roller is operating without any need for testing.

An additional object is Ito make the pressure change foolproof so that it can be carried out by unskilled or semiskilled personnel in a reliable manner.

Yet another object is the provision 4of pressure adjusting means which are light in weight and occupy a minimum of space so that the combined weight and bulk of the multitude of adjusting means necessary for the many drawing mechanisms of a spinning machine may be accommodated in the machine without significant increase in the structural strength and floor space requirements of the supporting frame beyond those necessary without the adjusting means of the invention.

With these and other objects in view, the invention provides top rollers rotatably supported on the common carrier arm by means of individual guide arms which are movable on the carrier arm. An abutment member is provided on one of the arms, preferably the guide arm, and a spring is interposed between the other arm, pref- ICC erably the carrier arm, and a face of the abutment member opposite the other arm. The spacing of that face from the one arm or guide arm is adjustable in discrete, predetermined steps.

Other objects and features of this invention will hereinafter become more fully apparent from the following detailed description of the annexed drawings, which illustrate preferred embodiments, and wherein:

FIG. l shows a drawing mechanism of the invention in fragmentary elevational section;

FIG. 2 shows a detail of a modified apparatus, drawn to enlarged scale, the apparatus being set for operation at a top roller pressure different from that of FIG. 1;

FIG. 3 shows the apparatus of FIG. 1 in a view corresponding to that of FIG. 2, and set for yet another top roller pressure;

FIG. 4 illustrates a modified embodiment of the invention in a view similar to that of FIGS. 2 and 3;

FIG. 5 shows the apparatus of FIG. 4 set for a different top roller pressure;

FIG. 6 illustrates the manner of adjusting the apparatus of FIGS. 4 and 5 approximately to the pressure setting of FIG. 5, the view being limited to a portion of the structure shown in FIGS. 4 or 5;

FIG. 7 similarly illustrates the adjustment of the apparatus of FIGS. 4 and 5 to a pressure setting between the settings shown in FIGS. 4 and 5;

FIG. 8 is a bottom view of the device of FIGS. 6 or 7;

FIG. 9 shows yet another embodiment of the invention in a view analogous to that of FIG. 3;

FIG. 10 shows the apparatus of FIG. 9 in partial front elevation taken in the direction of the arrow X in FIG. 9;

FIG. 11 illustrates an additional drawing mechanism in a fragmentary sectional side elevation;

FIG. 12 is a section taken in the plane of the line XII-XII of FIG. 11; and

FIG. 13 illustrates a modification of the device of FIG. 1l.

Referring now to the drawing in detail, and initially to FIGS. 1 to 3, there is shown a portion of a drawing mechanism having two top rollers 10, 11 and two bottom rollers 12. The bottom rollers are mounted on the nonillustrated supporting frame of the spinning machine in a conventional manner not further illustrated. The drawing area of the mechanism is defined by the common tangential plane between the rollers 10, 11, 12. A sliver 13 is moved through the drawing area in the direction of the arrow shown in FIG. 1.

The top rollers `are of the type in which two roller sections of relatively large diameter are coaXially connected by a shaft 10 of smaller diameter which is rotatably mounted on a guide 8. Of an elongated carrier arm 2 only the front end is seen in FIG. 1. It will be understood that the non-illustrated other end of the arm 2 is pivoted to the machine frame and is equipped with means for arresting pivoting movement of the arm 2 in the operative position illustrated in the drawing in which the top rollers engage the bottom rollers as is conventional. The carrier arm 2 may be moved between the operative and inoperative positions by a handle 1.

The carrier arm 2 is a channel member of U-shaped cross section which defines a downwardly open cavity. Individual supports 3, 4 for the top rollers 10, 11 are longitudinally slidable in the cavity of the carrier arm 2. The supports 3, 4 conform to the U-shaped section of the arm 2 and constitute respective portions of a channel. A longitudinal slot in the web portion of the arm 2 accommodates the shanks of two set screws 5 which threadably engage respective threaded openings in the supports 3, 4. The heads of the screws 5 abut against the outside of the web of the arm 2. The screws S permit the supports 3, 4 to be fixed in longitudinally adjusted positions on the arm 2.

The two flange 4portions of the supports 3, 4 are connected by respective pivot pins 6, 7. The guide arm 8 and another guide arm 9 are movably attached to the pin 6 and 7, respectively, in such a manner as to permit rotary movement of the arm about the axis of the corresponding pin, but also limited movement in a plane parallel to the afore-mentioned tangential plane in which the sliver 13 moves.

For this purpose, the arms S, 9 each have a relatively narrow end portion which is arcuately bent and hooked over the respective pin 6, 7. The front end portions of the arms 8, 9 have two lateral flanges which are recessed to provide a bearing for the shaft 10 of the front top roller 10 and for the corresponding shaft of the top roller 11.

Two helical compression springs 14, 14' are interposed between the web portion of the support 3 and the guide arm 8. A single spring 15 is provided between the support 4 and the guide arm 9 of the top roller 11. Since adjustment of the pressure of the front 4or delivery roller is generally more important than pressure adjustment for the other rollers, means for adjusting the spring pressure on the front top roller 10 only have been illustrated in FIGS. 1 to 12 of the drawings and will be described hereinafter. It will be understood though that this invention is not limited to adjustment of the front top roller of a drawing mechanism.

The pressure with which the top front roller 10 is urged against the cooperating bottom roller is generated by the two springs 14, 14' which are arranged one behind the other. Only the pressure of the front spring 14 is adjustable in the embodiment illustrated in FIG. l, but both springs may be made adjustable by duplicating the adjusting arrangement of the front spring.

As better seen in FIG. 2, the spring 14 is secured on the carrier arm 2 against lateral displacement by an integral tubular projection 16 on the support 3, and on the guide arm 8 by an abutment member 17 which has the shape of an inverted cup with a flanged rim. The spring 14 is seated on a face of the flanged rim opposite the web portion of the carrier arm 2. The spacing of the abutment member 17 from the guide arm 8 is determined by a screw 18. The screw threadedly engages a flanged sleeve 19 coaxial with the spring 14. The sleeve 19 is mounted in an aperture in the guide arm 8, and fixed in position by a beaded terminal portion thereof cooperating with the ange of the sleeve 19 to clamp the arm 8 therebetween. The head of the screw 18 abuts against a radial abutment face of the beaded sleeve portion, and the free end of the screw projects upward from the sleeve 19 and engages a spherically shaped recess 17 in the bottom wall of the abutment member 17.

The relative position of the carrier arm 2 and of the guide arm 8 is fixed in the operative condition of the vapparatus by the locking connection between the carrier arm 2 and the machine frame, and by the engagement of the top roller 10 and the cooperating bottom roller 12 which in turn is fixed on the frame. The stress of the spring, and the pressure exerted by it on the top roller 10 are therefore determined by the spacing of the flanged rim of the abutment member 17 from the guide arm 8. This spacing in turn is uniquely determined by the length of the screw 18 when the head of the latter abuts against the beaded end of the sleeve 19. The pressure of the spring 14 may thus be adjusted stepwise in a precisely predetermined manner by replacing the screw 18 by other screws of different length.

In the condition of the apparatus illustrated in FIG. 1,

no screw is inserted in the sleeve 19. The abutment member 17 is seated directly on the sleeve 19. The spring 14 is expanded to the greatest extent possible in the operative position of the apparatus, and exerts a minimum of pressure on the top roller 10.

In FIG. 3, the apparatus of FIG. 2 is shown provided with an adjusting screw 18 of greater length than the screw 18 seen in FIG. 2 so that the spring 14 is compressed to a shorter length and exerts greater pressure on the abutment member 17 and, thus, on the guide arm 8 than in the arragements illustrated in FIGS. 1 and 2. The spring pressure is transmitted to the arm 8 by the screw 18 and 18', respectively. Accidental rotation of the screws 18, 18 is prevented by the engagement of their heads with the beaded edge of the sleeve 19 which is slightly resilient and acts in the manner of a lock washer.

When it is desired to change the front top roller pressure in the several drawing mechanism of a spinning machine, the carrier arms 2 are swung upward into the inoperative position to give access to the screws 18, 18. The screws may be removed rapidly by means of a power driven screw driver and replaced by other screws of different length. Ordinary machine screws are manufactured to sufficiently close tolerance to be suitable.

To prevent errors, a spinning machine is preferably equipped with screws of different length, differing also in some other, more readily recognizable respects. The visible indicia by means of which the screws of different length may be distinguished may consist of a coating of colored material on the heads, different for each length, or preferably of differently shaped recesses requiring different screw driver blades for engagement, such as straight slots, hexagonal recesses engageable by a hexagonal bar, cross shaped recesses, and the like. If all screws of a certain length have the same head configuration different from that of all screws of different length, adjustment for a desired front top roller pressure can readily be carried out by selecting the proper screw heads and exchanging one set of screws by another set.

Excessive swinging movement of the guide arm 8 away from the carrier arm 2 in the inoperative position of the latter, and consequent loss of engagement between the springs 14, 14 and either arm 2 or 8 is prevented by an abutment 40 on the support 3 which engages a bent-over end of a leaf spring 39. The spring is clamped between the ange of the sleeve 19 and the guide arm 8, and is prevented from rotation about the axis of the sleeve by an integral lug portion 42 which engages an opening 41 in the guide arm 8. A similar arrangement prevents excessive rotary movement of the guide arm 9 away from the support 4.

The stepwise variation in the spacing of the abutment member 17 from the arm 8 is achieved in the embodiment of the invention illustrated in FIGS. l to 3 by interchangeable screws 18, 18 varying in length in steps which may be integral multiples of fractions of an inch as is conventional in the manufacture of machine screws. A similar stepwise variations is possible also with a screw, permanently installed, as is shown in FIGS. 4 to 8.

The drawing mechanism shown in these figures of the drawing is so similar to that of FIGS. 1 to 3 in structure and function, that it will be specifically described only asfar as it differs from the first-described embodiment'of the invention. The spacing of the abutment member 17 from the arm 8 is controlled by a grub screw 20 which transmits the pressure of the spring 14 to the top roller 10. FIGS. 4 and 5 respectively show the screw 20 in different axial positions corresponding to different pressures exertedby the spring 14.

The screw 20 is adapted to be rotated about its axis by means of a special tool as is better seen in FIGS; 6 to 8. As best seen in FIG. 8, the radial end face of the screw 20 remote from the abutment member 17 is formed with a recess 20 of approximately trapezoidal shape. The recess may be conformingly engaged by a blade 22 of an adjusting tool or screw driver 21. The beaded edge 25 of the sleeve 19 has a circumferentially elongated cutout 25 which terminates at two Walls 24 extending in a com mon axial plane.

The tool 21 has a plurality of axially and circumferentially spaced threaded openings which permit a bar or abutment 23 to be fastened to the tool 21 in any one of several axial and circumferential positions, one of which is illustrated in FIGS. 6 and 7. The angular alignment between the blade 22 of the tool 21 and the recess 20 in the screw 20 is determined by the shape of the recess. A desired axial position of the screw 20 is arrived at by withdrawing the screw 20 until the abutment member 17 is seated on the sleeve 19 in the manner shown in FIG. l, by fastening the bar 23 in a selected opening of the tool 21, and by rotating the tool until the bar 23 abuts against a wall 24.

For adjustment between only two positions, the tool 21 may be rotated between a position of abutment of the bar 23 against one wall 24 and the corresponding position of abutment against the -other wall 24 as will be evident from FIG. 8. In the latter case, the pitch of the threads on the sleeve 19 is preferably rather steep.

The several threaded openings in the tool 21 are preferably marked to identify spring pressures in any desired units or in any other manner, and the engagement of the bar 23 in one of the openings provides unmistakable indicia of the pressure set for the top roller 10.

In the embodiment of the invention illustrated in FIGS. 9 to 13, the pressure of the spring 14 is transmitted to the front top roller by means of a cylindrical rod 26 slidable toward and away from the carrier arm 2 in a sleeve 19' which differs from the sleeve 19 by the absence of internal threads. The several embodiments of the invention shown respectively in FIGS. 9 and l0, ll and l2, and 13 are basically similar to those described hereinabove, and further description is limited to the distinguishing features.

Referring rst to FIGS. 9 and l0, there is seen a lever 27 having opposite lateral flanges and being pivoted on a pin 29 carried by a modified arm 8'. The rod 26 which engages the spherical recess 17' in the abutment member 17 is urged by the pressure of the spring 14 against one arm 27' of the lever 27. The other arm 27" is thereby held against one of the at stop faces 31, 31', 31 of a stop member 28. The member 28 is a rod of hexagonal cross section equipped with two axially aligned eccentric trunnions 30 which rotatably engage corresponding openings in the opposite lateral flanges of the guide arm 8'. Two bores 33 in the stop member 28 extend approximately radially relative to the common axis of the trunnions 30 and are angularly spaced from each other to permit insertion of a control rod 32.

As shown in FIG. 9 in fully drawn lines, the lever arm 27" abuts against the stop face 31" of the stop member 28 which is closest to the common axis of the trunnions 30, whereby the pressure of the spring 14 is permitted to move the abutment member 17 to its position nearest the guide arm 8'. When the stop member 28 is turned into the position in which the stop face 31 farthest removed from the trunnion axis engages the lever arm 27, as shown in broken lines, *the abutment member 17 is raised to its highest position, and the pressure of the spring 14 is highest.

Because of the flat shape of the stop faces 31, 31', 31, the three adjusted positions of the abutment member 17 are stable, and may intermediate -setting of the stop member 28 is unstable. The apparatus illustrated in FIGS. 9 and l() is thus capable of only three discrete pressure settings for the top roller 10.

The stop member 28 has a plane of symmetry which passes through the trunnion axis. Although it has six stop faces, the members of three pairs of faces are equidistant from the axis, and only three different positions yare possible for the lever 27. Obviously, the trunnion axis may be arranged so as to provide six different settings, and stop members having more than six faces may be substituted for the member 28. In the present state of fiber technology, three settings of top roller pressure are considered adequate to cover all operating conditions which an apparatus of the type under discussion may be 6 called upon to handle, and a hexagonal stop member is preferred at this time.

In the modified drawing mechanism illustrated in FIGS. 1l and l2, the motion transmitting lever 27 of FIGS. 9 and l0 is dispensed with, and the stop faces of a hexagonal stop or switch member 34 eccentrically fastened to a shaft 35 by a pin 36 makes direct abutting contact with the pressure transmitting rod 26. The shaft 35 is journaled in a bracket 38 on a guide arm 8a and an end portion projects outward through the front end of the arm. The projecting end portion has a polygonal axial recess 37 in which a mating key 32' may be inserted for rotating the stop member 34, and for thereby varying the tension of the spring 14.

The embodiment of the invention illustrated in FIG. 13 shows an adjusting arrangement which permits coordinated simultaneous adjustment of the tension in both springs 14, 14' in a manner analogous to that illustrated in FIGS. 1l and 12. A second bracket 38 on the guide arm 8" provides a second bearing for a shaft 35' which not only carries the hexagonal stop member 34 for varying the tension of the spring 14, but also a second stop member 34 cooperating with another rod 26 slidable in another sleeve 19 to control the spacing of another abutment member 17 from the guide arm 8". The second abutment member 17 is engaged by the spring 14' in the same manner in which the first-described identical abutment member cooperates with the spring 14.

When the -two stop members 34 are identical and aligned on the :shaft 35', the pressures exerted by the springs 14, 14 are influenced by rotation of a key and of the shaft 35', the rotation and the key having been described with respect to FIGS. l1 and l2. It' so desired, the `stop members 34 may be made different, or they may be angularly offset in any desired manner to obtain any necessary measure of control. The shaft 35' may be replaced by an outer tubular shaft carrying one stop member 34 for control of the spring 14, and a coaxial inner shaft fastened to the other member 34 'for control of the spring 14', if independent control of these springs is =de sirable or necessary. Numerous other modifications will readily suggest themselves to those skilled in the art to adapt the apparatus described to specific operational requirements.

The embodiments of the invention illustrated in FIGS. 9 to 13 permit the spring pressure on the front top roller 10 to be adjusted with-out moving the carrier yarm 2 into the inoperative position, `and actually without stopping the .spinning machine. The pressure exerted by the top roller 10 may be determined Iby merely inspecting the portion of the adjusting mechanism which is visible from the outside while the drawing mechani-sm operates.

The location Iof the bores 33 in the dev-ice shown in FIGS. 9 and 10 is indicative of the pressure of the spring 14, and the bores thus c-onstitute indicia suicient to provide a pressure reading. In the apparatus illustrated in FIGS. 1-1 to lf3, .a similar reading may 'be taken from the position of the key 32 if the key is kept in engagement with the recess 37 in the shaft 35, 35', or the shaft end outside the guide arm may be provided with an eccentric mark. Where different pressure positions are separated 'by an angle of 60 as in these examples, cooperating in- -dicia on the guide arm are unnecessary. If pressure adjustment in smaller steps is provided for, it may be more desirable to provide marks on the larm which may be aligned with the eccentric mark on the shaft 35, 35.

It is a common feature of the Iseveral embodiments of the invention described hereinabove that a plurality of different closely predetermined front top roller pressures may be set on a drawing mechanism without any actual pressure mea-surement. The :several pressure settings are discrete and are attained in a simple and foolproof manner. Simple visual inspection methods permit to -ascertain that a desired top roller pressure has actually 'been set. In several embodiments of the invention, it is not necessary to interrupt the 4spinning operation for setting the'top roller pressure nor for inspecting the apparatus for the pressure set.

Obviously more than one top roller of a drawing mechanism may be equipped with the adjusting means of the invention for varying the spacing of an abutment member from the guide arm or the carrier arm, and if `only one top roller is so equipped, i-t need not necessarily 'be the front roller.

It should be understood therefore that the foregoing disclosure relates to only preferred embodiments of the invention, .and that it is intended to cover all changes and modifications lof the examples of the invention herein chosen for the purpose of the disclosure which do not constitute departures lfrom the spirit and scope of the invention set forth in the appended claims.

What is claimed is:

1. In a drawing mechanism for a spinning machine, in combination:

(a) a carrier arm;

(b) la guide arm mounted on said carrier arm for movement toward and away from the same;

(c) an abutment member on said guide arm and having a face opposite said carrier arm;

(d) spring means interposed between said face and said carrier arm for resiliently urging said guide arm away from said carrier arm;

(e) a pressure transmitting member movable on said -guide arm in a direction toward and away from said carrier arm and engaging said abutment member under the pressure of said spring means;

(f) a stop member rotatable on said guide arm about an axis transverse of said direction, said stop member having a plurality of angularly offset stop faces differently spaced from said transverse axis, each of said stop faces being abuttable against said pressure transmitting member under the pressure of said spring means for selectively limiting movement thereof away from said carrier arm in a plurality of discrete predetermined positions; and

(g) a drawing roller rotatably mounted on said `guide 2. In a drawing mechanism for a -spinning machine,

arm.

in combination:

(a) a carrier arm;

(b) a yguide arm mounted on said carrier arm for movement toward and away from the same;

(c) an abutment member on said guide arm and having a face opposite said carrier arm;

(d) spring means interposed between said face and said carrier arm for resiliently urging said guide arm away from said carrier arm;

(e) `a pressure transmitting member movable on said guide arm in a direction t-oward and away from said carrier arm and engaging said abutment member under the pressure of said spring means;

(f) a stop member rotatable on said guide arm about an axis and having a plurality of angularly offset faces;

(g) moti-on transmitting means engaging said pressure transmitting member under the pressure of :said spring means, and lbeing abuttable against each of said stop faces by rotation of said stop member for Iselectively limiting movement of said pressure transmitting member in ya direction away from said carrier arm in `a plurality .of discrete predetermined positions; and

(h) a drawing roller rotatably mounted on said guide arm.

3. In a mechanism as set forth in claim 2, said motion transmitting means including a lever member pivoted on said guide arm `and having two arm portions respectively abuttingly engaging said pressure transmitting ymember and a selected one of .said stop faces.

4. In a drawing mechanism for a spinning machine, in combination:

(a) a carrier arm;

(b) a guide arm movable on said carrier arm toward and away from a drawing area;

(c) at least a single abutment member on one of said arms, said abutment member having a face Vopposite the other one of said arms;

(d) spring means interposed between said face and said -other arm;

(e) 4adjusting means for setting thes pacing of said face from said other arm, said adjusting means including a pressure transmitting member movable on said one arm toward and away from said other arm and engaging said abutment member;

(f) variable stop means for limiting movement of said pressure transmitting member in a direction away from said one arm in a selected one of a plurality of discrete Ipredetermined positions, said stop Imeans including a stop member .mounted on said one arm for rotation about an axis, said stop member having a plurality of stop faces differently spaced from said axis of said member and selectively abuttable against said pressure transmitting member; and

(g) at least a single drawing roller rotatably mounted on said guide arm.

5. In a drawing mechanism for a spinning machine,

comprising (a) a carrier arm,

(b) at least a single guide arm movable on said carrier arm toward and away from a drawing area,

(c) at least a single abutment member on one of said arms, said one arm being formed with at least a single aperture, said abutment member having a face opposite the other of said arms,

(d) spring means interposed between said face and said other arm,

(e) an elongated threaded member for movably adjusting said abutment member, said threaded member having a first or free end and a second end, and loosely supporting said abutment member at said free end,

(f) interiorly threaded sleeve means received in said aperture for threadedly receiving said threaded member, said sleeve means having an abutment face,

(g) abutment means provided on said threaded member at said second end thereof for engagement with said abutment face, and

(h) at least a single drawing roller rotatably mounted on said guide arm.

6. In the drawing mechanism according to claimlS, said abutment member having a containerlike shape, a bottom, a free edge, and an outwardly extending flange at said free edge, the face of said flange remote from said bottom constituting said abutment member face, said threaded member interiorly engaging, at said second end thereof, said bottom and thus effecting the loose support of said aubtment member by said threaded member.

7. In a drawing mechanism for a spinning machine, comprising (a) a carrier arm,

(b) at least a single guide arm movable on said carrier arm toward and away from a drawing area,

(c) at least a single abutment member on one of said arms, said one arm being formed with at least a single aperture, said abutment member having a containerlike shape, a bottom, a free edge, and anoutwardly extending ange at said free edge, said flange having a face opposite the other of said arms,

(d) spring means interposed between said face and said other arm,

(e) an elongated threaded member for movably adjusting said abutment member, said threaded member having an end and interiorly engaging said bottom at said end, thus loosely supporting said abutmentmember,

comprising (a) a carrier arm,

(b) at least a single guide arm movably on said carrier arm toward and away from a drawing area,

(c) at least a single .abutment member on one of said arms, said one arm being formed with at least a single aperture, said abutment member having a containerlike shape, a bottom, a free edge, and an outwardly extending flange at said free edge, said ange having a face opposite the other of said arms,

(d) spring means interposed between said face and said other arm,

(e) an elongated threaded member for movably adjusting said abutment member, said threaded member 20 having an axis, a first anda second end, and a radial face at said second end, said radial face being provided with engaging means, said engaging means being adapted to be engaged for adjustment of said threaded member, said threaded member interiorly engaging said bottom at said rst end, thus loosely supporting said abutment member,

(f) an interiorly threaded sleeve received in said aperture for threadedly receiving said threaded member, and

(g) at least a single drawing roller rotatably mounted on said guide arm.

References Cited by the Examiner UNITED STATES PATENTS 2,694,230 11/54 Dausch 19-281 2,758,340 8/56 Anderson 19-282 2,900,674 8/59 Werth 19--282 2,955,330 10/60 Kraft 19-28'1 X FOREIGN PATENTS 1,260,265 3/61 France. 1,070,529 12/59 Germany.

700,996 12/53 Great Britain.

775,709 5/57 Great Britain.

561,598 4/57 Italy.

DONALD W. PARKER, Primary Examiner. 

5. IN A DRAWING MECHANISM FOR A SPINNING MACHINE, COMPRISING (A) A CARRIER ARM, (B) AT LEAST A SINGLE GUIDE ARM MOVABLE ON SAID CARRIER ARM TOWARD AND AWAY FROM A DRAWING AREA, (C) AT LEAST A SINGLE ABUTMENT MEMBER ON ONE OF SAID ARMS, SAID ONE ARM BEING FORMED WITH AT LEAST A SINGLE APERTURE, SAID ABUTMENT MEMBER HAVING A FACE OPPOSITE THE OTHER OF SAID ARMS, (D) SPRING MEANS INTERPOSED BETWEEN SAID FACE AND SAID OTHER ARM, (E) AN ELONGATED THREADED MEMBER FOR MOVABLY ADJUSTING SAID ABUTMENT MEMBER, SAID THREADED MEMBER HAVING A FIRST OR FREE END AND A SECOND END, AND LOOSELY SUPPORTING SAID ABUTMENT MEMBER AT SAID FREE END, (F) INTERIORLY THREADED SLEEVE MEANS RECEIVED IN SAID APERTURE FOR THREADEDLY RECEIVING SAID THREADED MEMBER, SAID SLEEVE MEANS HAVING AN ABUTMENT FACE, (G) ABUTMENT MEANS PROVIDED ON SAID THREADED MEMBER AT SAID SECOND END THEREOF FOR ENGAGEMENT WITH SAID ABUTMENT FACE, AND (H) AT LEAST A SINGLE DRAWING ROLLER ROTATABLY MOUNTED ON SAID GUIDE ARM. 